Who is the Irish sea god, son of Lir, and ruler of the Otherworld?

Who is the Irish sea god, son of Lir, and ruler of the Otherworld? Manannán mac Lir is the Irish sea god, son of Lir, and a ruler and guardian of the Otherworld.

Manannán belongs to the wider Gaelic mythological tradition and is closely associated with the Tuatha Dé Danann. His name is commonly understood as “Manannán, son of Lir,” with Lir or Ler connected to the sea. Although Lir appears as a sea deity and ancestor, Manannán becomes the more prominent supernatural figure in medieval Irish stories.

His Otherworld dominion is linked with places such as Emain Ablach, the Isle of Apple Trees, Mag Mell, the Plain of Delights, and Tír Tairngire, the Land of Promise. He uses an enchanted mist of invisibility, or féth fíada, to conceal his realm and the dwellings of other supernatural beings.

Manannán is also famed for magical possessions: the self-navigating boat Sguaba Tuinne, the water-running horse Aonbharr, and the sword Fragarach. He appears in Irish, Scottish, and Manx traditions, and is related to the Welsh figure Manawydan fab Llŷr. Lir is the father figure here, not the answer itself.